Type-writing machine.



G. B. BRAND. q TYPE WRITING MACHINE.

APPLICATION FILED JUNE 5. 1914.

Patented Aug. 24, 1915.

2 SHEETS-SHEET1.

TNVENTU WHTNESSLS WSATTURNEY G. 8. BRAND.

TYPE WRITING MACHINE.

APPLICATION map JUNE 5.1914;

' Patented Aug. 24,1915.

INVENTUR:

MNTNESEES H15 ATTJIJRNEY tinrrn snares earns carton.

GEORGE B. BRAND, OF SYRACUSE, NEW YORK, ASSIGNOR, BY MESNE ASSIGNMENTS, '10 REMINGTON TYPEWRITER COMPANY, OF ILION, NEW YORK, A. CORPORATION OF NEW YORK.

TYPE-WRITING MACHINE.

Specification of Letters Patent. Patented Aug. 24%, 1%15.

Application filed June 5. i914. Serial No. 843,188.

To all "LC/L07. it may concern Be it known that I, Gnonon B. BRAND, citizen of the llnited States, and resident of Syracuse, in the county of Onondaga and My present invention relates to ribbon.

mechanism for typewriting machines, and its general ob ect is to provide nnproved mechanism of the character specified.

To the above and other ends my invention consists in the-features of construction. combinations of devices and arrangements of parts hereinafter described and particularly pointed out in the claims.

The preferred form of my invention is illustrated in the accompanying drawings wherein Figure 1 is a fragmentary front-to-rear vertical sectional view of the upper part ofv a Monarch typewriting machine embodying the invention. Fig. 2 is a plan view, partly diagrammatic, of the ribbon mechanism. Fig. 3 is a sectional view taken axially of the right-hand ribbon spool and showing certain of the associate ribbon reversing devices. Fig. 4 is a similar view showing the relationship of the parts when the ribbon has been completely unwound from the spool and also showiing the bearing of the spool shaft. Fig. 5 is a fragmentary plan view of. Fig. 4. Fig. 6 is afragmentary plan view of the ribbon spool.

Referring first to Fig. 1, the main frame of the machine comprises posts 1 supporting a top plate 2 from which rise standards 3 whereto are fixed oppositely grooved rails 4: which cooperate through anti friction balls 5 with the grooved rear bar 6 of a platen carriage which further comprises end bars 7 embracing between them and supporting a rotary platen 8. The carriage is constantly urged leftward by a spring drum 9 to which it is connected by a band 10, and

leftward step-loy-step movements of the carriage are controlled by devices comprising a feed rack 11 pivotally supported on the carriage and normally meshing with a feed pinion '12'having a shaft journaled in a bracket 13 rising from the top plate 2. Operatively connected with said pinion is a toothed escapement Wheel 14: with which Rem ington.

co-act key controlled escapement dogs or detents of ordinary construction not herein shown.

The usual ribbon feeding mechanism of the machine comprises a driving shaft 15 (Figs. 1 and 2) which is connected through devices comprising small beveled gear wheels 16 and-17 with the source of power or spring drum 9 in such a way that during leftward feed movements of the carriage rotary movements are communicated to said shaft which turns in bearings or lugs depending from the top plate and is also slidable longitudinally therein. Said shaft carries beveled driving pinions 18 which are adapted to mesh in alternation with trains of spool turning devices, each comprising a small beveled gear 19 fixed to the rear end of a forwardly extending shaft 20, said shaft having fixed to its forward end a beveled pinion 21 which constantly meshes with a slightly larger bevel pinion 22 fixed to the lower end of an upright spool shaft 23, there being two shafts 23, one at each side of the machine and forward of the platen, said shafts turning in bearings 24 integral with the top plate. A collar 95 fixed to said shaft above the top plate prevents it from dropping down out of its bearing. The parts heretofore described arecommon to the Monarch machine and need not be furassociate gears 1%) to turn one or the other of the spool shafts 23 to wind the ribbon on the spool carried by said shafts, the ribbon at the same time being drawn off the other ribbon spool.

One object of the present invention is to provide mechanism in which spools of simple and ordinary construction may readily be employed, and in the present instance the spool illustrated is like that of the No. 10 typewriting machine. Such spools are comparatively cheap and when a ribbon has been exhausted, it is'preferable to remove the spool carrying it and. substitute a spool containing a new ribbon, thus avoiding the tedious operation of winding the ribbon off a supply spool on to a spool whichremains permanently in the machine.

The spool herein illustrated, reference being had especially to Figs. 3 to 6, comprises two disk-like flanges 26 and a connecting '23 and the upper flange is formed with a hole 29 in register with the lower hole, the upper hole being provided with diametrically opposite inwardly extending lugs or projections 30 which engage in vertical slots or grooves 31 formed in the upper part of the shaft 23, the construction preventing any rotation of the spool independently of theshaft. The lower flange is provided with a slot or opening 32 and the core 27 has at one side a slot or opening 33 in register with the slot 32, these slots affording a passageway for certain ribbon reversing devices hereinafter described. One side of the shaft 23 is slotted near its upper end as indicated at 34 to house a locking spring 35, the upper end of which is secured to the shaft and the lower end is bent or bowed outward beyond the periphery of the shaft so as to hold the spool thereon. The radius of the hole 28 is less than the distance that the bowed portionof the spring 35 stands away from the axis of the shaft when the spool is in place, and consequently it is necessary to force the spring in toward the axis of the shaft in order to remove the spool, this being, of course, effected by the side of said hole 28.

When in position the lowerfiange of the spool rests on a plate or platform 36 which is securedin place on top of the collar 25 by rivets 37 which are preferably integral with said collar. Said platform also serves as a support for a device of novel construction that is included in the train of ribbon reversing devices. To this end the said platform is slotted at one side as indicated at 38 and the sides of the slotted portion are bent downward vertically, forming ears 39 which support a pivot pin or axle 4:0. The novel reversing device aforesaid is an angular member designated as a whole by the reference numeral all and comprising an upright portion or finger 42 which is adapted to play in and out through the slot 33 in the spool core 27 but is normally confined within said core by the plies of ribbon wound on the spool, as illustrated in. Fig. 3, wherein the ribbon is designated as r. The ribbon is secured at its ends to the spool cores in any suitable manner and in its course from-one spool to the carrier 43 (Fig. 1) which is moved up and down to cover and uncover the printing point when the printing keys are actuated,

. as is well understood. Bent off inward from the sides of the lower portion of the finger 42 are cars at which are perforated to fit over the pin 4:0, said ears being confined between'the ears 39 and said pin serving as the pivot ofthe device 41. Below the cars 44 the device'el is formed with an arm or connecting portion as which is bent outward other passes through a vibratory horizontally substantiallyat right angles ithe finger 42 and terminates in a cam portion 46 extending oppositely from the arm 45, one end of said cam portion terminating in a hook or stop device 47 which is inclined upward slightly above the horizontal plane of the portion 46. The outer face or concentrically in respect to the axis of the shaft 23, but the end portion 48 of said face is curved eccentrically, forming an inclined surface, and operates as a cam for actuating edge is curved for the greater portion of its lengththe associate train of ribbon reversing deas shown in Fig. 4: to arrest the cam portion 4:6 in operative position. The member 41 at the left-hand side has the portion 46 reversed or oppositely disposed but is otherwise like t e right-hand member illustrated and described. Said train of reversing devices comprises a member or lever 49 of the first order fulcrumed on a screw 50 secured to the top plate. One arm of said lever has journaled on it at its outer end a downwardly coned or tapered anti-friction roll 51 and the opposite end is provided with a hole 52 for connecting withthe'ribbon reversing train, which will be briefly described with reference to Figs. land 2. Said train in itself is of the usual Monarch construction, comprising a slide rod 53. bearing in a bracket 54 secured to the under side of the top plate. Fixed to the outer end of said rod is an upwardly extending crank arm 55 which engages in the hole 52 in the lever 4C9. Surrounding the forward portion of said rod is a coiledspring 56 which is confined between one end of the bracket 54 and a collar 57 secured to said rod. Said spring tends constantly to force-the rod rearward and to maintain the lever 49 in the position illustrated. in Fig. 3 and in dotted lines in Fig. 5. The rear end of said rod atthis time is engaged with the upstanding arm of an angular member 58 pivoted at 59 to a stationary bracket 60, said member having a horizontal and forwardly extending weighted arm which is provided with a tooth 61 that is disposed above aworm G2 fixed to the end of the shaft 15 outside the neighboring pinion 18. l'Vhcn the rod 53 engages the member 58 the tooth 61 is held out of engagemcnt with the worm 62 but when said rod is drawn forward, as illustrated in Fig.

1, by the action of the reversing cam on the.

shaft 15 continues to turn it is gradually moved endwise to effect a disengagement of one of the pinions 18 from its associate gear 19 and a concurrent engagement of the other of said pinions with its gear, and as a result the direction of longitudinal feed of the ribbon is reversed. Two trains of reversing devices are provided for cooperation with worms on opposite ends of the ribbon driving shaft.

In view of what has been said it will be necessary to add only a brief explanation in connection with the novel elements of the construction. It Will be observed from Fig. 4 that-the upper end portion of the finger 42 is bent or inclined inward so that even when it is not controlled by the ribbon its upper end is within the periphery of the spool core 27. As a consequence, when one spool is removed and a new full spool replaces it, there is'no liability of the end or tip of the finger 42 catching on the ribbon since said end will be inside of the innermost strand or ply which, as will be clear from Fig. 6, passes in a straight line across the opening or slot 33 from one edge thereof to the other. The result is that as the ribbon spool is pushed down in place this straight portion of the ribbonwill act to cam the finger inward and swing the member 41 on its pivot to the Fig. 3 position, in which position the cam portion 46 is swung up partly through the slot 32 and above the top of the roll 51. In the course of operating the machine the spool will be turned by and with its shaft 23 without anyco-action between the member 46 and the roll 51 until the ribbon has been entirely unwound from the spool, allowing the member 41 to swing down of its own weight until the cam portion 46 is in position to cooperate with the roll 51. As turning movement of the spool thereafter continues the cam edge 48 will engage with said roll as shown by dotted lines in Fig. 5 and will forcethe roll outward to the full'line position in said figure, causing the lever 49 to turn on its pivot and pulling the rod 58 forward as described, after which the concentric part of the outer edge back of the cam 48 will ride over the roll 51 without causing any subsequent change in position of the lever 49. The hook 47 acts as a stop or safety device and if for any reason the reversal has not taken place prior to the engagement of said hook with the roll 51, such engagement will effect a positive stop of the spool, preventing any further rotation in the unwinding direction. The upward UQIlCl ofthe hook 4? prevents its catching on the roll 51 when the spool is rotating in the winding-on direction.

It will be observed that by the present construction the prior mechanism is considerably simplified, the. usual reversing camv and the controlling device or latch therefor being replaced in the present instance by the single member 41 in which the cam and controllingdevice are integral and rigid with each other; also that the cam in the present instance cooperates with an anti-friction roller instead of a rigid pin or projection, thus reducing the friction and promoting ease of operation; while the construction is also adapted for the employment of spools of other makes than that of the usual Monarch ribbon spool, thus widening the field of usefulness.

Various changes may be made without departing from my invention.

hat I claim as new and desire to secure by Letters Patent, is v 1. In a typewriting machine, the combination of ribbon spools; means for turning said ribbon spools to feed the ribbon longitudinally; and means for reversing the direction of longitudinal feed, said reversing means comprising cams one for each spool and controlled by the ribbon, and levers operative by said cams. said levers each carrying an anti-friction roll pivoted thereon, with whichroll the associate cam engages to actuatethe associate lever during the ribbon reversing operation.

2. In a tvpewriting machine, the combination of ribbon spools: means for turning said ribbon spools to feed the ribbon longitudinally; and means for reversing the direction of longitudinal feed, said reversing mechanism comprising trains of devices associated with each spool, each train comprising a pivoted device controlled by the ribbon and including a cam at one of its ends and stop device at its opposite end, and a lever operative by said cam and subsequently coactive with said stop device to prevent further turning of the associate ribbon spool.

3. In a typewriting machine, the combination of ribbon spools; means for turning said ribbon, spools to feed the ribbon longitudinally; and means for reversing the 'direction of longitudinal feed, said reversing means comprising trains of devices associated with each spool. each train comprising a device controlled by theribbon and including av cam at one of its ends and a hook at its opposite end, and a lever carrying an anti-friction roll, said cam being operative on said lever through said roll and said hook cooperating with said roll to arrest the associate spool and prevent further turning movements thereof.

4. In ribbon reversing mechanism for typewriting machines. the combination of trains of devices one train associated with each ribbon spool, each train comprising a cam member pivotally supported beneath the associate spool and having a portion extending up through the core of the spool and confined within said score by the plies of ribbon wound thereon, said cam member furmachines the combination of a pair of ther comprising a horizontally disposed cam portion rigid with said finger portion, and

a device actuated by said cam portion.

1 rotatable with said shafts; and trains of ribbon reversing devices one train associated with each spool, each train including an angular member pivoted on said support and comprising a vertically disposed por tion within the core of the associate spool and controlled by the plies-of ribbon wound thereon and further comprising a horizontally disposed portion provided with a cam that effects an actuation of the associate devices comprised in the train.

6. In ribbon mechanism for typewriting machines, the combination of a pair of upright spool shafts; horizontal plates or platforms secured on said shafts; ribbon spools supported by said platforms and connected to rotate with said shafts; means for retaining said spools -seated on said platforms;

angular members pivoted to said platforms at the under side thereof and comprising each a finger projecting up through a slot in the platform and a slot in the ribbon spool into the core of said spool, said finger being controlled by the plies of ribbon wound on said. core, and further comprising an arm projecting radially outward at substantially right angles to said finger, said arm terminating in a portion that is provided at one end with a cam and at the opposite end with a hook or stop, said cam and said hook being connected by an edge concentric with the axis of rotation of the associate shaft;

a ribbon driving shaft; trains of connections between said spool shafts andsaid driving shaft; and devices operative by said cams for shifting said shaft back and forth endwise to render said trains alternately operative and reverse the directions in which said spools are turned.

Signed at Syracuse, in Onondaga, and State of New York, day of June-A. D. 1914.

GEORGE B. BRAND.

the county of this 2d Witnesses:

BESSIE Gr. Krr'rnn, JULIA S. BUTLER. 

